Analisis Pengendalian Kualitas Lasan Dengan Metodologi Six Sigma Pada PT. XYZ (Studi Kasus Pada Proyek X)
| Main Author: | Amrullah, Aam; Universitas Bakrie |
|---|---|
| Format: | Article application/pdf eJournal |
| Bahasa: | eng |
| Terbitan: |
Universitas Bakrie
, 2015
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| Online Access: |
http://journal.bakrie.ac.id/index.php/jurnal_ilmiah_ub/article/view/1150 http://journal.bakrie.ac.id/index.php/jurnal_ilmiah_ub/article/downloadSuppFile/1150/3621 |
Daftar Isi:
- Penelitian ini membahas tentang Rejection Rate pada proses pengelasan. Tujuan dari penelitian ini adalah untuk mengidentifikasi penyebab dan mengurangi kecacatan pada proses pengelasan, di mana menimbulkan perbaikan atau pengerjaan ulang. Objek penelitian ini adalah perusahaan PT. XYZ yang bergerak dalam bidang industri konstruksi dan fabrikasi baja (EPC+F+I Company). Penelitian ini dianalisis menggunakan metodologi Six Sigma dengan tahapan Define, Measure, Analyze, Improve, Control (DMAIC). Metode Six Sigma merupakan pendekatan peningkatan kualitas untuk mencapai 3,4 kecacatan per satu juta kesempatan. Hasil penelitian ini diperoleh 2 penyebab dominan terjadinya perbaikan atau pengerjaan ulang pada proses pengelasan, yaitu cacat elongated sebanyak 62,72% dan cacat rounded sebanyak 35,20%, yang dikualifikasikan sebagai Critical to Quality (CTQ). Nilai Welding Rejection Rate proyek X pada PT. XYZ bernilai 0,65%, di bawah batas maksimum yang ditetapkan PT. XYZ sebesar 2%. Selain itu, hasil analisis penelitian menggunakan metode Six Sigma diketahui bahwa nilai DPMO (Defect Per Million Opportunities) sebesar 2.395,82 dan nilai Sigma 4,32. Dari hasil analisis penyebab masalah cacat elongated dan cacat rounded, diketahui faktor utama penyebab adalah dari segi performa dan ketersediaan mesin, performa welder, material, dan metode pengelasan. Di samping itu, dampak terhadap biaya dari cacat pengelasan ini, diestimasikan PT. XYZ telah mengeluarkan biaya sebesar Rp 411.390.834,00. Kata kunci: CTQ, Pengendalian Kualitas, Six Sigma, DMAIC This study discusses Rejection Rate in the welding process. The purpose of this study is to identify the causes and reduce defects in the welding process, which causes repair or rework. The object of this research is PT. XYZ that is engaged in the construction industry and steel fabrication (EPC + F + I Company). Analysis of this study use Six Sigma methodology and these stages are Define, Measure, Analyze, Improve, Control (DMAIC). Six Sigma methods is a quality improvement approach to achieve 3.4 defects per million opportunities. The results of research is obtained by two dominant causes of the occurrence of repair or rework in the welding process, the defect elongated as much as 62.72% and defect rounded as much as 35.20%, which qualifies as Critical to Quality (CTQ). Welding Rejection Rate project X at PT. XYZ is 0.65%, below the maximum limit that sets by PT. XYZ by 2%. In addition, the results of research analysis using Six Sigma methods is known that the value of DPMO (Defect Per Million Opportunities) at 2.395,82 and the value of Sigma at 4.32. From the analysis of the causes of defect elongated and defect rounded, known major factors are performance and availability of the machine, welder performance, materials, and welding methods. In addition, the impact on costs of these welding defects is estimated that PT. XYZ has spent Rp 411,390,834.00. Keywords: CTQ, Quality Control, Six Sigma, DMAIC DAFTAR PUSTAKA Antony, J., Banuelas, R., & Kumar, A. (2006). World Class Application of Six Sigma. Burlington: Elsevier Ltd. Brue, G. (2002). Six Sigma For Managers. United States of America: McGraw-Hill. Gaspersz, V. (2002). Sistem Manajemen Kinerja Terintegrasi Balanced Scorecard Dengan Six Sigma Untuk Organisasi Bisnis Dan Pemerintah. Jakarta: PT. Gramedia Pustaka Utama. Gaspersz, V. (2007). Lean Six Sigma For Manufacturing and Service Industry. Jakarta: PT. Gramedia Pustaka Utama. Gygi, C., DeCarlo, N., & Williams, B. (2005). Six Sigma For Dummies. Indianapolis: Wiley Publishing Inc. Marihot, H., & Goklas. (1984). Mengelas Logam Dan Pemilihan Kawat Las. Jakarta: PT. Gramedia. Nasution. (2005). Manajemen Mutu Terpadu. Bogor: Ghalia Indonesia. Pyzdek, T., & Keller, P. A. (2010). The Six Sigma Handbook (3rd ed.). United States of America: The McGraw-Hill Companies, Inc. Sower, V. E. (2011). Essentials of Quality. United States of America: Jhon Wiley & Son Inc. Stamatis, D. (1947). Failure Mode And Effect Analysis: FMEA from theory to execution (2nd ed.). Suryabrata, S. (2011). Metodologi Penelitian. Jakarta: PT RajaGrafindo Persada. Thomsett, M. C. (2005). Getting Started in Six Sigma. Hoboken: John Wiley & Sons, Inc. Widharto, S. (2003). Petunjuk Kerja Las (5th ed.). Jakarta: PT. Pradnya Paramita.